Thomas watson



(No Model.)

- T. WATSON.

GOMBINED-BOLSTER AND STEP FOB. SPINDLES.

No. 279,680. Patented June 19,1883.

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"UNITED STATES. PA EN OFFICE.

THOMAS WATSON, or PAISLEY, OOUNTYQF RENFREW, ASSIGNOR TO JAMES & PETER COATS, OF FERGUSLIE woRKs'rAIsLEY, SCOTLAND.

COMBINED BOLSTER AND STEP FOR SPINDLES.

SPECIFICATION forming part of Letters Patent No. 279,680, dated June 19, 1883.

Application filed May 26, 18852. '(No model.) Patented in England March 6, 1882, No. 1,066.

My invention relates to the common Rabethspindle; and it has for its object to provide means whereby a spindle having its whole bearing, including the step, in one piece, called a bolster, may be thoroughly lubricated,

- and for permitting the dirt and grit to escape for the spindle.

from such a bolster.

To this end my invention consists in the construction and combination of parts hereinafter fully described and claimed, reference being had to the accompanying drawings, in which Figure 1 is a central vertical section of my i1wention, showing part of a spindle in elevation; and Fig. 2 is an elevation of the bolster.

A represents the spindle, provided with the "usual whirl, D. g

B is the bolster-support, secured as usual in the rail 0.

E is the bolster whichis the subject of this invention, and which is also partially shown, in connection with my spring for governing the action of the same, in my application for a patent, Serial No. 60,161, now pending in the United States Patent Office. This bolster E is reduced .in size along the upper portion of its body, between theshoulders or collars c, to admit the springs a. It is also reduced to about the same diameter at the lower end to form the shoulder f, to rest on a corresponding shoulder in the support B. The bolster is a little loose in the support to permit lateral move ment to the spindle, the same being cushioned and centrally guided by the spring a. The bolster is not bored through its length, a portion being left at the lower end as a step, d, By this means I bring the whole bearing of the spindle within one piece, which is a great advantage in avoiding friction. In spindles which are journaled midway in a yielding bolster having a bearing against the sides or on a shoulder of the support and stepped in the support, which is a different piece from the bolster, any yielding I to the bottom of the oil-chamber B.

of the upper end of the bolster throws it out of line with the step in the support, causing friction on the spindle. This my combined bolster and step avoids. The sides of my bolster are perforated with holes toadmit oil to the interior, and the collars or shoulders e e and f are slotted down to the reduced size of the body, to permit vertical passage of oil in the support, which serves as an oil-reservoir. The lower end of the bolster is slotted at F in a longitudinal plane crossing through its diameter to a depth sufficient to completely cut through and across the inner bottom of the spindle-step and a little higher in its side walls. The object of this complete diametrical cut through the step is to form, practically, radialv edges therein, to serve as scrapers to clean from the lower end of the spindle the sediment of the oil and particles of grit, whichwould otherwise become embedded in either the spindle or thestep, causing friction and wear.

I am aware that small holes have been made in the center of spindle-steps to permit sediment to escape but such holes are of very little use 011 account of the great speed at which the spindle revolves, throwing the oil and its contents to the circun'iferenceby centrifugal force. In practice it is found that oil will draw in at such a hole while the spindle is revolving, and if there is no other outlet the oil will quickly work to the top of the bearing and fly away over the edge.

I am also aware that spindle-steps have been perforated with small round holes leading to the edge of the base of the spindle or step. As a means of discharging mere sediment, this is a better device than the central hole, for it is properly located to discharge the centrifupose of my invention neither the aforesaid central hole, nor the later-mentioned edge holes, can produce the desired effectthat is, of scraping off any particle of grit from the end of the spindle and discharging it to settle There is not sufficient pressure of the sides of the spindle against its support to embed grit in the progress of the descent to the bottom, but the weight of the spindle Very quickly produces lars e, and the slot F, completely crossing the wear when the grit arrix es at the step. My lower end of the bolster through the step as IO invention instantly removes all such ilnpediand for the purpose specified.

ments.

What Kclaim, and wish to secure by Letters THOMAS Patent, is lVitnesses:

Ihe combined bolster and step E, provided ARTHUR O. HALL,

with the vertically-slotted shoulder f and col- 7 JOHN LEWIs. 

